Divergence of turbulent fluxes in the surface layer: case of a coastal city |
| |
| Authors: | G Pigeon A Lemonsu C S B Grimmond P Durand O Thouron V Masson |
| |
| Institution: | (1) Centre National de Recherches Météorologiques, Météo-France/CNRS-GAME, 42 av. Coriolis, 31057 Toulouse Cedex, France;(2) Department of Geography, King’s College London, WC2R 2LS London, UK;(3) Laboratoire d’Aérologie, UMR5560, CNRS - Université Paul Sabatier, Toulouse III, Toulouse, France |
| |
| Abstract: | This study quantifies the processes that take place in the layer between the mean building height and the measurement level
of an energy balance micrometeorological tower located in the dense old core of a coastal European city. The contributions
of storage, vertical advection, horizontal advection and radiative divergence for heat are evaluated with the available measurements
and with a three-dimensional, high-resolution meteorological simulation that had been evaluated against observations. The
study focused on a summer period characterized by sea-breeze flows that affect the city. In this specific configuration, it
appears that the horizontal advection is the dominant term. During the afternoon when the sea breeze is well established,
correction of the sensible heat flux with horizontal heat advection increases the measured sensible heat flux up to 100 W m−2. For latent heat flux, the horizontal moisture advection converted to equivalent latent heat flux suggests a decrease of
50 W m−2. The simulation reproduces well the temporal evolution and magnitude of these terms. |
| |
| Keywords: | ESCOMPTE-UBL Flux divergence Horizontal and vertical advection Sea breeze Urban energy balance |
| 本文献已被 SpringerLink 等数据库收录！ |
|
